Rising interest rates in Japan and the likelihood of further monetary tightening by Bank of Japan have made local investors cautious about scooping up corporate bond deals this year. Photo by Andrew Harnik/Getty Images/Postmedia files

Berkshire Hathaway Inc. hired banks for a potential yen-denominated bond sale , as borrowers around the world drove issuance so far this year to a new record.

The proposed sale from veteran investor Warren Buffett’s company would bring it back to the yen market for the second time this year, and spurred speculation it may be mulling more investments in Japan . The local yen debt market has seen a pick-up in bond offerings this week by overseas issuers with Renault SA and Slovenia getting ready to price deals.

The bond mandate is another sign of

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